LightCone8 Cosmological Calculator

Welcome to LightCone8, a flexible tabular/charting cosmological calculator for the history and the future of expansion of the universe. Lightcone is based on the standard LCDM cosmic model. You specify the range and number of steps of a table and it gives you times, distances and a host of optional values, characterizing the cosmic expansion history and/or future in that range. The calculator has two input data-sets to choose from, but the values can be adjusted as the user requires.

If you adjust the cosmological values by any appreciable amount, you will be calculating for a different universe, not necessarily ours. It is best to leave them at one of the two default (Planck or WMAP) values for now, otherwise you may get results that are difficult to understand. You may want to play around with various redshift (z) ranges for your output table, though.

Further, the user can select various sets of output columns to tabularize/chart over ranges of redshift values. For more information, hover over the ? circles (tooltips) on the calculator. There is also a short user guide available at this Wiki.

Parameter	Range	Conversions
Hubble constant (km s^-1 Mpc^-1)	10 to 100	Present Hubble radius, R_H (Gly)	14.455
Lambda density parameter, Ω_L	>0.001 to 1.00	Future Hubble radius, R_∞ (Gly)	17.415
Radiation, matter equal, z_eq	100 to 999999	Matter density parameter, Ω_m	0.3110
Total density parameter, Ω	> 0.6889 to 1.5	Radiation density parameter, Ω_R	0.0000918
Upper row reshift, z_upper	> z_lower to 200000	Present Time (Gyr)	13.787
Lower row redshift, z_lower	-0.99 to < z_upper
Number of steps displayed	-100 to 100	Click box for linear steps

Chart Options

Vert min	Vert max	Set according to selected y-columns
Hor min	Hor max	Set according to selected x-column
Vert marks	Hor marks	Divisions+1
Vert size	Hor size	Pixels

Keep Open

z	T_now Gyr	R Gly	D_now Gly	H(z)	Temp (K)
1.09e+3	3.71e-4	6.25e-4	4.53e+1	1.56e+6	2.97e+3
3.39e+2	2.49e-3	3.94e-3	4.41e+1	2.48e+5	9.27e+2
1.05e+2	1.52e-2	2.34e-2	4.20e+1	4.18e+4	2.89e+2
3.20e+1	8.98e-2	1.36e-1	3.80e+1	7.20e+3	9.00e+1
9.29e+0	5.21e-1	7.83e-1	3.09e+1	1.25e+3	2.81e+1
2.21e+0	2.97e+0	4.36e+0	1.83e+1	2.24e+2	8.74e+0
0.00e+0	1.38e+1	1.45e+1	0.00e+0	6.77e+1	2.73e+0
-6.84e-1	3.27e+1	1.73e+1	1.11e+1	5.66e+1	8.62e-1
-9.00e-1	5.27e+1	1.74e+1	1.48e+1	5.62e+1	2.73e-1
-9.68e-1	7.28e+1	1.74e+1	1.60e+1	5.62e+1	8.62e-2
-9.90e-1	9.28e+1	1.74e+1	1.64e+1	5.62e+1	2.73e-2

For a Tutorial and the Math used, see this Physics Forums Insights Tutorial and the same Tutorial, part III. Credits to @Mordred, @Marcus and @George Jones for invaluable inputs and to Coburt and @pbuk for major reprogramming excercises.

Courtesy Relativity-4-Engineers